What I have done
since |$f^4$ (w)| <= M
1/2 <= f <= 1
I applied the Taylor remainder formula
What im not sure about is the value of M. Since im calculating upper bound, I let M =1 and x=1/2 as given.
I believe I calculated the Taylor error but what do I do now to find the upper error. Is there a formula for this?
Is this the right way of approaching this question?